It is not currently possible to add more than 4 fully-working bots. It is a limitation caused by a lack of coding in the EXE to handle more than 4. Serge was
looking into it but he nor anyone else has had any success.
As a workaround, housebots have been created in the GMF files of some arenas but they don't support everything that normal bots do. There are some good topics on this subject:
here,
here, and
hereThere is also another workaround involving trying to pack more than one bot into a .bot file. This works because the chassis is treated as a component. IIRC, the issue with this is that if one of the chassis are destroyed then both bots are destroyed and one of the bots can't use wheels to move. As far as discussion topics go, I could only find
this one but many modders have done it before so we can explain it further if necessary.