This is a replacement for !NewLook that uses far less valuable memory (about 100Kb less RMA) whilst still offering high-res. sprites and 3D windows.
NB: This patch is only for RISC OS 3.1 machines.
Although the instructions with the patch assume that you are using the new style !Boot (like a RiscPC's), the patch is usable without it: you'll just have to work out how to install it yourself.