Actually, the answer is fairly simple. 1: Go to the "model" drawing. 2: If in r-200X go to a "Layout" tab, or if in r-13,14 go to "P-Space ("PS" or paperspace"

.3: run the "solview" command, & for best results, use the "UCS" option, "W"orld option, and for scale, use 1. 4: Go into the M-Space ("MS" Model Space) viewport you've just created. Then use the "vpoint" command, with 1,1,1 as the standard "Iso" viewpoint.(note: If you want some other view, use "orbit" (or in r13-14 "dview"-"ca"

, pick a view you like. 5: Return to P-Space (via "PS" command,etc.)Use "Soldraw" to create 2D "Isometric" geometry of the 3D part. 6:Return to the "MS" viewport, and W-Block (or any method you prefer) to get the 2D geometry you just created out to a seperate file. 7: Insert it where you wish, into the target 2D componenet detail drawing, at any scale you wish. You can even explode it and tinker with the individual lines any way you wish, as the "picture" geometry you just brought in is 2D, and all your normal techniques will work from here. One other thing- try experimenting with LT-Scale and layer visibilities to tinker with the "hidden-line" layer you just brought in. You brought in both visible and hidden linework. Check it out!
Good Luck!