[Android Apps and Games] Rapid81:
What you can modify:

The resolution (not the exact one, but alignments and sizes)

Rows and cols of the appdrawer

Rows and cols number of the desktop/home

Open and closed radius of the corners

The align of the icons in the corners

First, dump the SE_Arc_Home.apk with APKTool. Then the following files may contains useful things to you. :)

res\values\integers.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

<integer name="folder_max_rows">4</integer> - maximum rows of icons in folders

<integer name="folder_max_cols">4</integer> - maximum cols of icons in folders

<integer name="apptay_grid_rows">3</integer> - rows of the appdrawer (at hdpi resolution, the used value is in values-hdpi\integers.xml)

<integer name="apptray_grid_cols">4</integer> - cols of the appdrawer

<integer name="desktop_grid_rows">4</integer> - rows of the icons on home

<integer name="desktop_grid_cols">4</integer> - cols of the icons on home

<integer name="stage_grid_cols">4</integer>

<integer name="min_pane_switch_duration">1000</integer>

<integer name="desktop_first_pane_switch_wait_duration">0</integer>

<integer name="pane_margin">15</integer>

<integer name="number_of_desktop_panes">5</integer> - pages of home

<integer name="scale_up_transition_scale_duration">300</integer>

<integer name="scale_up_transition_translate_duration">240</integer>

<integer name="scale_up_transition_alpha_duration">240</integer>

<integer name="text_shadow_radius">1</integer>

<integer name="text_shadow_dx">1</integer>

<integer name="text_shadow_dy">1</integer>

</resources>

res\values\dimens.xml (at hdpi res, you'll found some values in values-hdpi\dimens.xml too)

<?xml version="1.0" encoding="utf-8"?>

<resources>

<dimen name="folder_arrow_size">17.0dip</dimen>

<dimen name="folder_title_height">50.0dip</dimen>

<dimen name="folder_padding_left">10.0dip</dimen>

<dimen name="folder_padding_top">43.0dip</dimen>

<dimen name="folder_padding_right">10.0dip</dimen>

<dimen name="folder_padding_bottom">11.0dip</dimen>

<dimen name="icon_image_width">48.0dip</dimen>

<dimen name="icon_image_height">48.0dip</dimen>

<dimen name="hint_corner_radius">2.0dip</dimen>

<dimen name="icon_padding_top">5.0dip</dimen>

<dimen name="cell_width">80.0dip</dimen> - width of the icons on home (80x4=320, at 5 icons 320/5=64)

<dimen name="cell_height">100.0dip</dimen> - height of the icons on home (100x4=400, at 5 icons 400/5=80)

<dimen name="desktop_height">400.0dip</dimen> - the "usable" height of home

<dimen name="folder_cell_width">74.0dip</dimen> - width of folders

<dimen name="folder_cell_height">80.0dip</dimen> - height of folders

<dimen name="stage_cell_width">64.0dip</dimen>

<dimen name="stage_cell_height">82.0dip</dimen>

<dimen name="stage_breadth">93.0dip</dimen>

<dimen name="apptray_cell_width">75.0dip</dimen> - width of icons in appdrawer (75x4=300, at 5 icons 300/5=60)

<dimen name="apptray_cell_height">110.0dip</dimen> - height of icons in appdrawer (110x4=440, at 5 icons 440/5=88)

<dimen name="apptray_portrait_height">360.0dip</dimen> - height of the appdrawer

<dimen name="desktop_transform_bottom_margin">53.0dip</dimen>

<dimen name="desktop_padding_top">25.0dip</dimen>

<dimen name="desktop_padding_left">0.0dip</dimen>

<dimen name="desktop_nudge_width">5.0dip</dimen>

<dimen name="desktop_right_nudge_padding_right">0.0dip</dimen>

<dimen name="desktop_pane_switch_margin_left">30.0dip</dimen>

<dimen name="desktop_pane_switch_margin_right">30.0dip</dimen>

<dimen name="desktop_focus_padding_right">0.0dip</dimen>

<dimen name="desktop_focus_padding_bottom">0.0dip</dimen>

<dimen name="desktop_pane_switch_nudge_offset">30.0dip</dimen>

<dimen name="folder_scroll_margin">30.0dip</dimen>

<dimen name="apptray_pane_switch_margin_left">30.0dip</dimen>

<dimen name="apptray_pane_switch_margin_right">30.0dip</dimen>

<dimen name="apptray_pane_switch_nudge_offset">30.0dip</dimen>

<dimen name="apptray_right_nudge_padding_right">0.0dip</dimen>

<dimen name="apptray_nudge_width">5.0dip</dimen>

<dimen name="apptray_margin_top">35.0dip</dimen>

<dimen name="apptray_padding_left">8.0dip</dimen>

<dimen name="apptray_padding_top">16.0dip</dimen>

<dimen name="apptray_backplate_offsetx">0.0dip</dimen>

<dimen name="apptray_backplate_width">0.0dip</dimen>

<dimen name="switch_apptray_button_padding_side">3.0dip</dimen>

<dimen name="apptray_controls_padding_side">10.0dip</dimen>

<dimen name="trashcan_padding_side">7.0dip</dimen>

<dimen name="folder_icon_selector_icon_margin_left">12.0dip</dimen>

<dimen name="folder_icon_selector_side">58.0dip</dimen>

<dimen name="badge_text_size">12.0dip</dimen>

<dimen name="network_name_text_size">13.0dip</dimen>

<dimen name="network_name_view_size">18.0dip</dimen>

<dimen name="corner_button_max_icon_size">48.0dip</dimen>

<dimen name="apptray_uninstall_badge_offset">4.0dip</dimen>

<dimen name="app_share_drop_zone_height">25.0dip</dimen>

<dimen name="app_sharing_icn_padding">1.0dip</dimen>

<dimen name="folder_minis_padding_top">5.5dip</dimen>

<dimen name="styles_fbi_buttoncontainer_marginTop">20.0dip</dimen>

<dimen name="styles_fbi_buttoncontainer_marginBottom">20.0dip</dimen>

<dimen name="styles_fbi_button_text_size">14.699982dip</dimen>

<dimen name="semc_text_size_medium">18.0sp</dimen>

<dimen name="semc_text_size_small">14.0sp</dimen>

<dimen name="semc_text_size_button">@dimen/semc_text_size_small</dimen>

</resources>

Now I'll show you how you can modify the corners. These lines can be found in smali\com\sonyericsson\cornerbutton\CornerButton.smali file.

The closed radius of the corners

.line 215

new-instance v2, Lcom/sonyericsson/cornerbutton/CornerButtonArc;

const/16 v3, 0x

60

The expanded radius of the corners.

The important part is with red. If you reach "ff" at the first column, you can use the second. So, you can set the second column from 0 to 1, and you can start over with the first one from 0. (I hope it's understandable. :D )

sput-object v0, Lcom/sonyericsson/cornerbutton/CornerButton;->EXPANDED_RADIUS:[I

return-void

nop

:array_0

.array-data 0x4

0x3ct 0x0t 0x0t 0x0t

0x5at 0x0t 0x0t 0x0t

0xb0t 0x0t 0x0t 0x0t

0xcct 0x0t 0x0t 0x0t

0xfft 0x0t 0x0t 0x0t

.end array-data

.end method

The position of the icons in the corners

.line 216

new-instance v2, Lcom/sonyericsson/cornerbutton/CornerButtonActions;

const/16 v3, 0x

19

const/16 v4, 0x

2b

If you've done with the settings, repack the apk with APKTool, then sign it with SignAPk. After that, try it out.