Paper-size limitation and saved-settings of paper-size

I like saving a long page of html as a single page pdf file. I use PdfCreator as my main pdf printer on Windows 7. I also use Xubuntu 13.10.


1. Paper-Size Limitation

For PdfCreator on Windows 7, I see that the "PostScript Custom Page Size" has the maximum value for Width and Height. It is 200 inch (5080 mm; 14400 pt).
What is the reason for the limitation ?
Is there anything I can do to have the page height, say, 7.500 mm ?


2. Saved-Settings of Custom Paper-Size

For the pdf printer on Xubuntu, I can set my custom paper size. The setting is saved in the folder "/home/myusername" in the file ".gtk-custom-papers".

The following is the contents of that file (in millimeter):
--------------------
[paper0]
Name=Paper5000
DisplayName=Paper5000
Width=210
Height=5000
MarginTop=5
MarginBottom=5
MarginLeft=5
MarginRight=5
Orientation=portrait

[paper1]
Name=Paper7500
DisplayName=Paper7500
Width=210
Height=7500
MarginTop=5
MarginBottom=5
MarginLeft=5
MarginRight=5
Orientation=portrait

[paper2]
etc. etc.
-------------------

Can I have the similar saved-settings of custom paper-size by using PdfCreator on Windows7 ?


Thanks