[HD2 Windows Mobile 6.5 ROM Development] GuzuGuzu:
I have tried this long time ago and it always crasheds on the first boot.

If you try my ROM you will see that Twitter, Stock, Internet, People and Footprint tabs are all disabled. All the other tabs are arranged to my like including the Today Page.

What should actually interest you is the following code under [HKEY_CURRENT_USER\Software\HTC\Manila] key, where DWORD:00000002 disables the page:

"Manila://album.page.hidden"=dword:00000000
"Manila://calendar.page.hidden"=dword:00000000
"Manila://email.page.hidden"=dword:00000000
"Manila://footprints.page.hidden"=dword:00000002
"Manila://home.page.hidden"=dword:00000000
"Manila://inforwidget.page.hidden"=dword:00000002
"Manila://internet.page.hidden"=dword:00000002
"Manila://messaging.page.hidden"=dword:00000000
"Manila://music.page.hidden"=dword:00000002
"Manila://people.page.hidden"=dword:00000002
"Manila://PeopleDetail\peopleMessage.page.hidden"=dword:00000000
"Manila://PeopleDetail\peopleMessageClassic.page.hidden"=dword:00000002
"Manila://PeopleDetail_SIM\peopleMessage.page.hidden"=dword:00000000
"Manila://PeopleDetail_SIM\peopleMessageClassic.page.hidden"=dword:00000002
"Manila://settings.page.hidden"=dword:00000000
"Manila://today.page.hidden"=dword:00000000
"Manila://twitter.page.hidden"=dword:00000002
"Manila://weather.page.hidden"=dword:00000000

As for tabs arrangements, you have to take care of the following REG Keys located in [HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\]. Each page has its own number, which is actually the row order in Manila.

Take a look below at what I have cooked in my ROM. By the way the Enable feature of the page has to be the same as above; i.e. if Twitter page is disabled, then settings have to indicate that it is disabled in both - above code and below. Be carefull.

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration]

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\0]
"Enable"=dword:00000001
"PageName"="Manila://home.page"
"Title"="[[IDS_HOMETITLE]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\1]
"Enable"=dword:00000000
"PageName"="Manila://people.page"
"Title"="[[IDS_FAVORITEPEOPLETITLE]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\2]
"Enable"=dword:00000001
"PageName"="Manila://today.page"
"Title"="Today Screen"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\3]
"Enable"=dword:00000001
"PageName"="Manila://messaging.page"
"Title"="[[IDS_MESSAGESTITLE]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\4]
"Enable"=dword:00000001
"PageName"="Manila://email.page"
"Title"="[[IDS_EMAILTITLE]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\5]
"Enable"=dword:00000000
"PageName"="Manila://internet.page"
"Title"="[[IDS_INTERNETPORTALTITLE]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\6]
"Enable"=dword:00000001
"PageName"="Manila://calendar.page"
"Title"="[[IDS_CALENDAR]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\7]
"Enable"=dword:00000000
"PageName"="Manila://inforwidget.page"
"Title"="[[IDS_STOCK]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\8]
"Enable"=dword:00000001
"PageName"="Manila://album.page"
"Title"="[[IDS_PHOTOSANDVIDEOS]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\9]
"Enable"=dword:00000000
"PageName"="Manila://music.page"
"Title"="[[IDS_MUSICTITLE]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\10]
"Enable"=dword:00000001
"PageName"="Manila://weather.page"
"Title"="[[IDS_WEATHER]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\11]
"Enable"=dword:00000000
"PageName"="Manila://twitter.page"
"Title"="[[IDS_TWITTER]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\12]
"Enable"=dword:00000000
"PageName"="Manila://footprints.page"
"Title"="[[IDS_FOOTPRINTS_TITLE]]"

[HKEY_LOCAL_MACHINE\Software\HTC\Manila\Configuration\13]
"Enable"=dword:00000001
"PageName"="Manila://settings.page"
"Title"="[[IDS_SETTINGSTITLE]]"

PS: when cooking, make sure file "ManilaFull.xml" is not included in your kitchen, it won't let you do any changes to Manila settings after phone boot.