updating a table on an existing infomaker file

Hello,

We are building two custom screens that will look identical (with 90% similar fields) and will work  hand in hand. I've spent a bit of time building one. What I would like to do is save as that custom screen in infomaker as a new file - and then open/change the table that is linked to it. without deleting fields and recreating it from scratch. 

In other words we have the following table1

table1.id
table1.customer_no
table1.x
table1.y
table1.z

I've built a second table - table2 (it has the following fields)

table1.id
table1.customer_no
table1.x
table1.y
table1.p

realistically only 1 different field.

I don't want to recreate the infomaker data from scratch or  calculated formulas or design or layout. 

i want to open ud_local_table1 (linked to table1)

save it as ud_local_table2 

i want to change the table thats linked -- inside infomaker and say id will remain linked to id, customer_no to customer_no, x to x and so on ... the only field that will disappear is the z that doesn't exist in table2. I've been searching and can't figure out how to do this. 

does anyone have any ideas?

thanks in advance