[Windows Phone 7 Development and Hacking] ChrisKringel:
That sounds like great news. It would be a huge advantage if we could get our hands on a package that updates the registry rather than a few language files...

Do you know what the *.dsm files are? From viewing them I would assume they are somehow certificate related... They also contain a link to a Certificate Revocation List

http://crl.microsoft.com/pki/crl/products/MicrosoftMobilePCA.crl

€dit:

I took a look into the Chevron updater an extracted the links used to download the NoDo-Update

public Updater()
{
this.actionTimer = new Stopwatch();
this.lastStep = -1;
this.osUpdates = new List<string> { "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7389.0-7.0.7390.0-armv7-retail-microsoft.pks_669700d5014b3a9c73fe81390281620ca29d0675.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/01/diff-7.0.7355.0-7.0.7389.0-armv7-retail-microsoft.pks_35616816bdd0b9c08e39cdbab9fc9f7bfafec5ac.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7008.0-7.0.7355.0-armv7-retail-microsoft.pks_7fea4585c1275be10e4c06adffb3c4e42372f7d2.cab" };
this.languageUpdates = new List<string> {
"http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7008.0-7.0.7355.0-armv7-retail-microsoft.lang_0407.pks_4c77b51d9ae1114f3a0d5aeb47adc5e781fec04b.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7008.0-7.0.7355.0-armv7-retail-microsoft.lang_0409.pks_65fe09539f02edc8e1d44609fb537b87613063ea.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7008.0-7.0.7355.0-armv7-retail-microsoft.lang_040c.pks_e0c4e50429486eeb100752c0c956cda8b98e02de.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7008.0-7.0.7355.0-armv7-retail-microsoft.lang_0410.pks_4a27af7e5f1baf3243b6220419aa1cd1ebe43958.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7008.0-7.0.7355.0-armv7-retail-microsoft.lang_0809.pks_b1006360c74695b323988cdee3aafd608d469693.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7008.0-7.0.7355.0-armv7-retail-microsoft.lang_0c0a.pks_7871a8595b50c7bb32443fad4df7f735d6b7c04f.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/01/diff-7.0.7355.0-7.0.7389.0-armv7-retail-microsoft.lang_0407.pks_464df1a0972db2c7028d53d6465cdc5ec0192b84.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/01/diff-7.0.7355.0-7.0.7389.0-armv7-retail-microsoft.lang_0409.pks_0cdfd833159cd10036e6025ec1db784dd712b2f4.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/01/diff-7.0.7355.0-7.0.7389.0-armv7-retail-microsoft.lang_040c.pks_f6cc1ff8991c0f113aff142af3f78cfd6a203529.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/01/diff-7.0.7355.0-7.0.7389.0-armv7-retail-microsoft.lang_0410.pks_e041d85cc2c49c20aecce9428339f411d4e837e2.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/01/diff-7.0.7355.0-7.0.7389.0-armv7-retail-microsoft.lang_0809.pks_83b3967ab7eacd863245811ae0b762f242f4dbd7.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/01/diff-7.0.7355.0-7.0.7389.0-armv7-retail-microsoft.lang_0c0a.pks_02ec89c1f4b7495915204f0751873121f68b009e.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7389.0-7.0.7390.0-armv7-retail-microsoft.lang_0407.pks_cabe462db180b214e380969a82252923c8fbbb2e.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7389.0-7.0.7390.0-armv7-retail-microsoft.lang_0409.pks_b4e3f25a79cfd5514895169ba167d9bd0cdb135d.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7389.0-7.0.7390.0-armv7-retail-microsoft.lang_040c.pks_96edbca5e0b6285ccd8d841bb12531d38b57fd46.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7389.0-7.0.7390.0-armv7-retail-microsoft.lang_0410.pks_488bc339318e5530b2c67d022d79c0212674b6a8.cab",
"http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7389.0-7.0.7390.0-armv7-retail-microsoft.lang_0809.pks_6dc73e33c46694ee7316fa60740fb1b64d80e37c.cab", "http://download.windowsupdate.com/msdownload/update/software/dflt/2011/03/diff-7.0.7389.0-7.0.7390.0-armv7-retail-microsoft.lang_0c0a.pks_1a3cd8ee2df1f3988c1347badcd3bedeb373014b.cab"
};
this.Languages = new List<Language>();
this.Progress = new List<string>();
Language item = new Language {
ID = 1,
MUI = "0409",
Name = "English (United States)"
};
this.Languages.Add(item);
Language language2 = new Language {
ID = 2,
MUI = "0809",
Name = "English (United Kingdom)"
};
this.Languages.Add(language2);
Language language3 = new Language {
ID = 3,
MUI = "040c",
Name = "French"
};
this.Languages.Add(language3);
Language language4 = new Language {
ID = 4,
MUI = "0410",
Name = "Italian"
};
this.Languages.Add(language4);
Language language5 = new Language {
ID = 5,
MUI = "0c0a",
Name = "Spanish"
};
this.Languages.Add(language5);
Language language6 = new Language {
ID = 6,
MUI = "0407",
Name = "German"
};
this.Languages.Add(language6);
}

Some of the contain interesting files... For instance executables and dlls, and RGU files. From what i've read these RGU files are registry updates. However i wasnt able to open them. But i think its a start.