"-" in a Target System Type identifier

I'am revising old design errors at the moment (yes, there are some...), and MEEEEEP: there's some weird stuff to solve

We have a Target System Type here that is named "BIB-SISIS" with about 50000 accounts. Now I want to go step back from custom to generic VI_UnsAccountB_Generic as initial script, which calls scripts depending of the XProxyContext and Event (<Customerprefix>_UnsAccount_<XProxyContext>_<Event>).

But: Visual Basic doens't allow "-" in the method signatures (comes from XProxyContext<-Target System Type).

So: What is the best way to solve this? I can customize the VI_UnsAccountB_Generic process of course, but I don't like the idea to customize a process with core functionality.

Thank you,

Norbert