[Windows Phone 7 Development and Hacking] ceesheim:
Hmmmmm

I am almost out of ideas,this:

<wap-provisioningdoc>
<!-- *** COMMENTO *** -->
<characteristic type="Registry">
<characteristic type="HKLM\Software\Microsoft\Settings\{1DEF9B7D-2322-40eb-A007-16A75D5CDA6F}" translation="filesystem">
</characteristic>
<characteristic type="HKLM\Comm\InternetSharing\Settings" translation="filesystem">
<parm name="EnableConnection" datatype="string" value=""/>
<parm name="CellularConnectionName" datatype="string" value=""/>
<parm name="MaxUsers" datatype="string" value=""/>
<parm name="MaxPeers" datatype="string" value=""/>
<parm name="MOHelpNumber" datatype="string" value=""/>
<parm name="MobileOperatorHelpNumber" datatype="string" value=""/>
<parm name="WifiChannel" datatype="string" value=""/>
<parm name="Channel" datatype="string" value=""/>
<parm name="MOInfoLink" datatype="string" value=""/>
<parm name="MobileOperator" datatype="string" value=""/>
</characteristic>
<characteristic type="HKLM\Comm\InternetSharing\Settings" translation="filesystem">
<parm name="EntitlementURI" datatype="string" value=""/>
<parm name="EntitledATT" datatype="string" value=""/>
<parm name="Entitled" datatype="string" value=""/>
<parm name="EntitledTMO" datatype="string" value=""/>
<parm name="IdleTimeout" datatype="string" value=""/>
<parm name="PeerlessTimeout" datatype="string" value=""/>
<parm name="Global" datatype="string" value=""/>
<parm name="InfoLink" datatype="string" value=""/>
</characteristic>
<characteristic type="HKLM\Vendor\MSFT\Registry" translation="filesystem">
<parm name="DefaultSoftAP" datatype="string" value=""/>
<parm name="Title" datatype="string" value="SettingsRes.dll,#242"/>
<parm name="Location" datatype="string" value="app://5B04B775-356B-4AA0-AAF8-6491FFEA5629/_default"/>
<parm name="Plugin" datatype="string" value="{09c51652-2cbc-49d5-883e-20606f9a47ff}"/>
<parm name="Microsoft.SoftAP" datatype="string" value="NULL"/>
</characteristic>
<characteristic type="HKLM\Comm\InternetSharing\TestHooks" translation="filesystem">
<parm name="TmoUrl" datatype="string" value="selfhelp.geo.t-mobile.com"/>
<parm name="WINCE" datatype="string" value="/myaccountservice/selfhelp/hastetheringoption GEThasValidDataPlan"/>
<parm name="EntitlementApnbroadband" datatype="string" value="@WAP"/>
</characteristic>
<characteristic type="HKLM\Services\ICS" translation="filesystem">
<parm name="Dll" datatype="string" value="IcsService.dll"/>
<parm name="Order" datatype="integer" value="576"/>
<parm name="Prefix" datatype="string" value="ICS"/>
<parm name="Index" datatype="integer" value="0"/>
<parm name="ServiceContext" datatype="integer" value="1"/>
<parm name="DisplayName" datatype="string" value="ICS Service"/>
<parm name="Description" datatype="string" value="Internet Connection Sharing Service"/>
<parm name="UserProcGroup" datatype="integer" value="5"/>
<parm name="Flags" datatype="integer" value="18"/>
</characteristic>
<characteristic type="HKLM\Comm\ConnectionSharing" translation="filesystem">
<parm name="EnablePacketFiltering" datatype="integer" value="0"/>
<parm name="EnableAddressTranslation" datatype="integer" value="1"/>
<parm name="EnableDhcpAllocator" datatype="integer" value="1"/>
<parm name="EnableDnsProxy" datatype="integer" value="1"/>
<parm name="DisabledOnBoot" datatype="integer" value="1"/>
<parm name="SetLastDhcpAddrToIEH" datatype="integer" value="0"/>
<parm name="PrivateInterface" datatype="string" value=""/>
<parm name="PublicInterface" datatype="string" value=""/>
</characteristic>
<characteristic type="HKLM\Comm\InternetSharing\Settings" translation="filesystem">
<parm name="WiFiIPAddress" datatype="string" value="192.168.33.1"/>
<parm name="WiFiIpMask" datatype="string" value="255.255.255.0"/>
<parm name="RndisIPAddress" datatype="string" value="192.168.33.1"/>
<parm name="RndisIPMask" datatype="string" value="255.255.255.0"/>
</characteristic>
<characteristic type="HKLM\SOFTWARE\Microsoft\Settings\CanonicalNames">
<parm name="Microsoft.InternetSharing" datatype="string" value="{69DAA7D1-09EA-4eae-A67E-56E4B0B4CA5B}"/>
</characteristic>
<characteristic type="HKLM\SOFTWARE\Microsoft\Settings\{69DAA7D1-09EA-4eae-A67E-56E4B0B4CA5B}">
<parm name="default" datatype="string" value="InternetSharing"/>
<parm name="Plugin" datatype="string" value="{8ADBB9D2-2107-4044-9B63-0488124AD2F6}"/>
<parm name="Location" datatype="string" value="app://5B04B775-356B-4AA0-AAF8-6491FFEA5629/_default"/>
<parm name="Type" datatype="interger" value="1"/>
</characteristic>
</wap-provisioningdoc>

Didn't work for me to :(