Try searching for DOS scripting websites. There is a lot of good ones. Also search for some DOS utilities sites. There are several freeware DOS menu utilities, but they all tend to have various limitations. Your best bet is just experiment with each one you find & see if it suits your needs.
I am not sure what you mean by "popupmenu". In DOS it is very difficult to emulate Windows. Most DOS menu programs are text based, I have never personally seen a freeware version that can generate controlable popup menus. Most are just a better version of what DOS6 provides. By the way, why is the DOS6 menus unsuitable?
I suspect you are looking for the unatainable. Dos implies no Windows, thus no Kixtart4 & no programs like Shawn's. Without the Windows OS running it is very hard to look like Windows.
It is not scripting that limits you, it is the fact that you are not running Windows that limits you. DOS is an ancient and a very limited environment.
I believe this is not really the correct forum for this question. A better board might be:
http://discussions.virtualdr.com/
Post your question in the DOS section. This board has the best DOS teckie I have ever come across. His name is "Vernon Frazee". He use to be the moderator of the DOS section but last year he moved to the WinMe section. If you can't get an answer from posting in the DOS section, try asking Vernon directly.
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Jack