@Nick, naughty children get attention too, and a squeaky wheel gets oiled as well.
Perhaps the OP might consider using a IDE cable from an old computer, the ribbon cable that connects a CD rom or HHD to the motherboard, they are a double row 40 pin connector, but with a little work with a craft knife and its easy to make a 14 pin connector from the cable.
If the display needs to be detachable than the best option is a serial display or a I2C display, that way its a simple 3 or 4 wire connector, which is so easy to setup the header pins and make a cable for.
I have never used a serial display, but used many I2C displays, and for a add on display i would use I2C, one reason is for all circuit designs i reserve the I2C pins of a picaxe for I2C, should there be spare pins permitted in a circuit design.
This way i can add 100's of different I2C devices should i need, perhaps a keypad, or a LCD, even a RTC or extra eeprom, or all of them on the same circuit its then just plug and play, all thats needed is to write the device into program.
Then again this is only my view from what i can extract from the circuit/view expressed so far, as its a hard thread to follow with pigion english and changing requirements to your needs.
Perhaps start again and explain just what you want to do, even a photo or two of your project might help.