Slow Printing With PATHs?

I wrote an application that shows about 2000 GPS track segments on a map (ATV trails in Quebec). The user may select and zoom an area of the map, then print a detailed map that includes the GPS tracks:

When I print the map, I use the full resulution of the printer, so a 8.5x11 lanscape page on a laser printer generates a 6260 x 4800 bitmap. If I preview or print the entire page WITHOUT showing the GPS tracks, it appears / prints within 5-10 seconds.

When I include the GPS tracks, the preview is very fast (5-10 seconds) but the actual printing now takes over 10-12 MINUTES! I fail to see why the printing becomes SO SLOW when I include my GPS tracks.

My map only includes 3 graphics path, which were defined only once at the maximum zoom level:

- One RED path that includes all the tracks valid all year long (AnnualPath)
- One GREEN path that includes all the summer tracks (SummerPath)
- One BLUE path that includes all the winter tracks (WinterPath)

The printing is slow only when I add the 3 graphicspath to my printing output and looks like this:

' e = Drawing buffer of the Print function Factor = adjustment factor between the zoom level used when the graphicspath were defined and the actual printing zoom level

' HorzOffset = Horizontal adjustment to align the graphicspath with the output buffer VertOffset = Vertical adjustment to align the graphicspath with the output buffer

[Code]...

Anyone has an idea why adding a graphicspath to a printed page drastically slow it down? What should I do to imprime the printing speed? I have been baging my head on my monitor for the past week and I fail to see how I can fix that problem.