You could try to use the latest version of GhostPDL (sister application to Ghostscript; source code available from http://svn.ghostscript.com/ghostscript) to convert the file to PDF. GhostPDL can handle SVG (and XPS or PCL) in a similar way as Ghostscript does handle PostScript. So here goes the commandline:
gsvg.exe ^
-dNOPAUSE ^
-dBATCH ^
-dSAFER ^
-sOutputFile=my.pdf ^
-sDEVICE=pdfwrite ^
-g1178x5408 ^
c:/path/to/my.svg
Once you got a PDF, you should be able to print it easily from Acrobat{,Reader}. At least now with PDF we know different ways to reliably print one big-dimension file onto multiple sheets of (letter or A4 or A3) paper using a "posterize" utility.
Maybe such a "poster print" function is also available from Inkscape (which can open and print the SVG directly), but I'm not sure from the top of my head.