You will find that normalizing your data will be easier for you in the long run. You can solve the issues you specified with either a set relation on two tables or a SQL-select.
Example: If you create a screen with client info (parent)on the top and have the child table in the bottom, you can easily duplicate this screen for all child tables or even better, make the tablename and fields variable and pass them as a parameter so you could use the same screen for all your child tables.
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CLIENT : NAME
ADRESS
TEL
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ORDER 1 AMOUNT SHIPPING & HANDLING TOTAL
ORDER 2 AMOUNT SHIPPING & HANDLING TOTAL
ORDER 3 AMOUNT SHIPPING & HANDLING TOTAL
ORDER 4 AMOUNT SHIPPING & HANDLING TOTAL
ORDER 5 AMOUNT SHIPPING & HANDLING TOTAL
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< OK > < Cancel >

Hoping to be of any help.
Believe me normalisation is the way to go.
Juri