It sounds like you want to change the "user agent", Here is the info from the following thread:
http://ppcgeeks.com/wm5-registry-hac...tion-t113.html
Change the 'user agent' identification of Pocket Internet Explorer To change the 'user agent' identification of Pocket Internet Explorer, several fields need to be adjusted. The example shows how to identify as Internet Explorer 6 - desktop version
The standard compliance 'user-agent' string:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Int ernet Settings\5.0\User Agent\(Default) = "Mozilla/4.0" (REG_SZ string, no quotes)
Defaults to "Mozilla/2.0" The application/version string:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Int ernet Settings\5.0\User Agent\Version = "MSIE 6.0" (REG_SZ string, no quotes)
Defaults to "MSIE 4.01" The host operating system string:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Int ernet Settings\5.0\User Agent\Platform = "Windows NT 5.0" (REG_SZ string, no quotes)
Defaults to "Windows CE" Please note that if you change the Platform string, PDA-friendly sites may stop sending you PDA-friendly content automatically. Leave this string set to "Windows CE" unless a site absolutely refuses to work, or you want the site to feed you its normal content.