Urgent Please help we have only 2 days to decide

[JanuSweety]

My Husband is on L1B with Company A and he had valid visa stamped till Jun 2013 . Company B has applied H1B with COS in 2013 cap and got approved and effective date is from Oct 1st. For some unavoidable resons we want to continue on L1 for 2 more months like Oct, Nov and dec and later on we want to change to H1B with compnayB. Is there any way ?

We were serarching over the forums and found out this solution but there are few questions and also not sure whether it is legal or not :

Going out of country before sep 30 and return after oct 2nd on Valid L1 Visa .

If this can be done do we need to handover both the I-94 (L1B and H1B COS) before leaving the country at airport or just L1B I-94 is enough ?

What to do when we want to work on H1B after 3 months ?

Do we need to wait for next year cap or can we just ammend the COS ?

If we can ammend the COS then how long it will take for approval?

Any Chances of rejection at that point?

How much does it cost ?

Please advice us as we have only 2 days to take the decision . Appreciate for the help !!

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Sweety.