Made XPUI.nsh add the Plugin and Include directories relative to XPUI_SYSDIR to make detached installations work better.
[Settings]
NumFields=2
[Field 1]
Type=label
Text=Install Options Page A
Left=0
Right=-1
Top=0
Bottom=10
[Field 2]
Type=text
Left=0
Right=-1
Top=20
Bottom=100
flags=MULTILINE|VSCROLL|READONLY
State="Description:\r\n\r\n1 - Show custom page A (where you are now)\r\n2 - Show the components page\r\n3 - Show custom page B\r\n4 - Show directory page\r\n5 - Show custom page C\r\n6 - Show installation progress"