How to create a project in Silverlight 2 beta 2

After installing the relevant development tools, if the following error occurs when creating a Silverlight project:
Cocould not load type 'Microsoft. visualstudio. Web. Silverlight. ivssilverlightservice' from assemb' Microsoft. visualstudio. Web. Application, version = 9.0.0.0, culture = meutral, publickeytoken = b03f5f7f11d50a3a'

According to the description in the foreigner's post
Http://weblogs.asp.net/bradleyb/archive/2008/06/18/fixing-setup-errors-installing-silverlight-tools-beta-2.aspx

According to foreigners, download and run the vbs file first:
Http://weblogs.asp.net/bradleyb/attachment/6292576.ashx

Then run silverlight_chainer.exe again.

Solve the problem.

The vbs file performs some operations, including deleting kb949325, deleting all advertised features in Vs, and patching it.

In addition:
This problem does not seem to have been encountered by everyone, and it is not easy to search abroad. as far as my situation is concerned, this problem does not occur when it is installed on win2008 machine, but it occurs when it is installed on Vista ent SP1.
I am writing this article, hoping that all the friends who have encountered this problem can find this solution through the search engine, so as to avoid such a long delay as I have.