To compile ProScrabble:

Ensure that you have qt3-devel installed 
(if so qmake is a valid command)

I suppose that you uncompressed ProScrabble in /tmp/

cd /tmp/ProScrabble/lua/src
make
cd lib
make
cd ../../../
qmake ProScrabble.pro
make

to run it:
cd /tmp/ProScrabble/
./ProScrabble

Enjoy.

For a FAQ please visit www.logical-games.net the scrabble tutorial page.