Get ResHacker from
http://www.angusj.com/resourcehacker/
Open MSConfig (C:\WINDOWS\PCHEALTH\HELPCTR\Binaries\msconfig.exe) in it and goto the dialog section. Add, say 200, to the 3rd parameter (width) and 0 or 100 you the 4th parameter (height). This is Dialog 102. I've marked as red what I changed here by adding 200. This widens the dialog and the frame.
102 DIALOGEX 0, 0, 578, 220
STYLE DS_FIXEDSYS | DS_MODALFRAME | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_CONTROLPARENT | WS_EX_APPWINDOW
CAPTION "System Configuration Utility"
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
FONT 8, "MS Shell Dlg"
{
CONTROL "Tab1", 201, "SysTabControl32", TCS_TABS | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 2, 2, 574, 195
CONTROL "[Place Holder]", 205, BUTTON, BS_GROUPBOX | WS_CHILD | WS_VISIBLE, 6, 18, 566, 175
CONTROL "&Help", 207, BUTTON, BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 2, 201, 50, 14
CONTROL "OK", 202, BUTTON, BS_DEFPUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 211, 201, 50, 14
CONTROL "Cancel", 203, BUTTON, BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 267, 201, 50, 14
CONTROL "&Apply", 204, BUTTON, BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 323, 201, 50, 14
}
Next you have to do the dialog that is the startup tab. It is dialog 202. Again add 200.
202 DIALOGEX 0, 0, 566, 175
STYLE DS_FIXEDSYS | DS_CONTROL | WS_CAPTION
CAPTION "Startup"
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
FONT 8, "MS Shell Dlg"
{
CONTROL "List1", 251, "SysListView32", LVS_REPORT | WS_CHILD | WS_VISIBLE | WS_BORDER | WS_TABSTOP, 5, 5, 555, 148
CONTROL "&Enable All", 247, BUTTON, BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 184, 157, 85, 14
CONTROL "&Disable All", 248, BUTTON, BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 275, 157, 85, 14
CONTROL "&Restore Startup Programs...", 249, BUTTON, BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 5, 157, 96, 14
}
Now save as a new name. Bingo a bigger msconfig. You can do the other pages at you leisure. If you want you can change the font size for old eyes.