OLD Vertex Buffer Extension Documentation?

Hi, I am currently modding the TGE, and discovered that it uses an OLD, aparently undocumented vertex buffer extension, I am trying to bring the code up to date and converting from this extension to ARB_vertex_buffer_object, however althought not quite cryptic, the old extension is different in parts, and it would really help me if I could get my hands on the extension documentation.

I tried google, with no luck (seems like there is a project in sourceforge that uses the extension but nothing more), anyway, here are the functions I am looking documentation for:

glAvailableVertexBufferEXT
glAllocateVertexBufferEXT
glLockVertexBufferEXT
glUnlockVertexBufferEXT
glSetVertexBufferEXT
glOffsetVertexBufferEXT
glFillVertexBufferEXT
glFreeVertexBufferEXT

Thanks!