I don't think it will work, but maybe it does.
This is the code for a PSSliderCell:
<!-- Begin PSSliderCell -->
<dict>
<key>cell</key>
<string>PSSwitchCell</string>
<key>default</key>
<false/>
<key>defaults</key>
<string>com.ted2.example</string> <!-- Your package name. -->
<key>key</key>
<string>key1</string> <!-- Your key. -->
<key>label</key>
<string>Switch Text 1</string> <!-- Your Switch Name. -->
</dict>
<dict>
<key>cell</key>
<string>PSSliderCell</string>
<key>default</key>
<integer>50</integer> <!-- Enter the default value of the slider here. -->
<key>defaults</key>
<string>com.ted2.example</string> <!-- Your package name. -->
<key>key</key>
<string>key1slider</string> <!-- Your key. -->
<key>max</key>
<real>99</real> <!-- Enter your maximum value here. -->
<key>min</key>
<real>1</real> <!-- Enter your minimum value here. -->
<key>showValue</key>
<true/> <!-- Show the value of the slider. true or false. -->
</dict>
<!-- End PSSliderCell -->
Maybe you could use the
<key>max</key> and <key>min</key>
in the PSEditTextCell too.
I'm too lazy to try though.
I used http://armconverter.com/mshookgenerator/ for the example btw
It might return to MAX once the person goes over it.