has been publsihed by MS

http://www.microsoft.com/downloads/info.aspx?na=41&SrcFamilyId=6D146124-E850-4CEC-9EFA-33A5225E155D&SrcDisplayLang=en&u=http%3a%2f%2fdownload.microsoft.com%2fdownload%2f5%2f9%2fB%2f59B314A9-C064-4E88-9CBC-5819BECE4C20%2fDeploying+Remote+Desktop+Gateway+Step-by-Step+Guide.docx

The most common issues with RD Gateway (that we hear of at least) seem to be around certificates, recovation checking and web SSO from XP workstations – this doc is definately seems to cover most things from having a look over it – and has a companion doc for RDWeb and websso.

Worth a look in your lab if your setting this up.