I have sorted it now thanks.
I reduced the colour depth of all the textures and resized them to 512 X 384.
Also dropped the window size down to 800 x 600.
Used copyentity for several objects which were loaded rather than loadmesh.
It has now gone from 87Mb to 38Mb of system RAM.
Incidentally, the game so far has a series of corridoors, 11 rooms, 6 of which are furnished, 12 fully animated enemies and a main player.
I reduced the colour depth of all the textures and resized them to 512 X 384.
Also dropped the window size down to 800 x 600.
Used copyentity for several objects which were loaded rather than loadmesh.
It has now gone from 87Mb to 38Mb of system RAM.
Incidentally, the game so far has a series of corridoors, 11 rooms, 6 of which are furnished, 12 fully animated enemies and a main player.