To see what fonts you have in signlab presently, go to file/install/fonts, a box will appear. On the top right left side there are four boxes, true type, adobe, etc. All mine are checked. When you click the box Search Now, all the font types you checked will appear in the list. Look for the font you want to use in the list, highlight, and click install, it should be available to use in signlab.
When you go file/ install/fonts in signlab, there also is a browse function top right. Browse for the signlab font file you have, I think you mentioned a cd, make sure cadlink vef file type box is checked, and click search, the fonts on that file will hopefully appear.
George