Clean scan: Well, make sure your picture is cleaned up first. No eraser shavings all over them or stuff like that. But otherwise the scanner should scan them clean anyway, if you don\'t have the contrast too high.
Pixelated: Set the DPI higher. 75 makes the \'pixelated\' look. 150 is a good size, but if you want lots of detail shown (or a bigger picture to work from) scan at 300 or so DPI.
Colored: Well, I don\'t have Paintshop 7. I assume you mean Paintshop since you said Jasc..because Photoshop\'s made by Adobe. Anyway, since you said they\'re \'basically the same\'.. Scan the lineart in grayscale mode, 150 or so DPI. Adjust the levels (not sure how to do it in Paintshop, but in Photoshop it\'s under Edit > Adjust > Levels) to make the picture how you want it to look.
How you want it to look though, means you make the background pure white (sometimes scanners make it a light gray in grayscale mode) and the lineart pure black. That usually helps and allows fill tool stuff.
BUT... (I know I\'m rambling) If you have a tablet, you can use the lasso tool to make selections around all the parts you want to color. Say you\'re coloring Hello Kitty and you want her dress and earrings to be pink, you use the lasso and draw around them, then use the paint bucket and it will only fill those areas.
If you\'re real good with a mouse though, you could use a mouse to make the selections deal.
Oh hell, here\'s a tutorial that explains it better than I do. http://www.thenamelesspage.com/nameless/lpcellcolor01.html
Alright, I\'ll shut up now.