Add prefix in smatdial

[Guest bullrider]

When I need to make an international call trough my GSM carrier, I have to place #999 before the country code, the city code and the phone number. If I type all this on the Hermes phone keypad It's OK. But I store my international contacts begining with the country code, with out the #999 necessary to place the call.How can I bring the number from the contacts and type the #999 before the number on the keypad. The phone doesn't let to do this. I copy/paste the number but i can't add the prefix. HELP!! Please.