This reminded me to tell you that Slackware 12.1 packages will work on Vector 6.0. Usually, 12.2 slack packages work; 13.0 or 13.1 packages often work.
Unfortunately, no playonlinux in linuxpackages.net or on alien's site.
Gslapt > edit > preferences > sources tab > select testing. Update from new sources when prompted. Grab gslapt, restart gslapt, then grab Wine. I suggest deseclecting testing and updating sources again. Many leave testing on, tho.
The testing version of glsapt saves new size if you resize preferences. There are bugfixes in wine's testing version. I usually won't suggest testing repo to someone new to VL, but you obviously have more linux experience than I, and these work.
Now d/l generic package from playonlinux. Haven't tried it, and don't have time. hth, anyway.