reset choice between regular dialer and skypeout

If you have lost the chance to choose dialer or skype when you put in a
number on the dilapad, you have set a default for that action.
If you want to have the choice of Dialler or Skype, go to menu ->
settings -> applications -> manage applications>-dialler>clear defaults.Or
skype>clear defaults.
This will give you back the choice.
If you do not want the choice, when the dialler or skype choice appears,
simply choose which program you want to be the default.
Hope this helps.