kennca,
We have a toolbar button flyout for a bunch of different linetypes/spacings. Below are a couple. If you plug this into your 2dtl_win.dtb file (and make some associated bitmaps) you can grab these on the fly. I'd attach the bitmaps I made if there were a way to add attachments here...
[LINETYPE]
DropDownCount=30
Hint=LINETYPE
Icon=LINETYPE2
A=^;^S7^Solid^$^S8^1.0$^S0^;^
Hint00=Insulation 3-5/8"
Icon00=ins-3-58
A00=^;^S7^S7^S4^Insul1^$^S8^.1.13.16$^S0^:^
Hint01=Insulation 6"
Icon01=insl-6
A01=^;^S7^S7^S4^Insul1^$^S8^.3$^S0^:^