Character Studio biped files (.bip) are supported in 3D Studio Max and as such it should be possible to somehow convert BIP data and save them as 3DS files. Maybe you can also do that in some other modeling programs, but as of today we don't know any other.
Convert Character Studio biped file to 3ds Max (3D Studio MAX) graphics.
We found one software available in the database for this conversion.
Microsoft Windows software - convert bip to 3ds on Windows
A widely-used 3D animation application from Autodesk
Convert from bip file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.