use it to pay the purchased fund! thus, i do not think you need to apply any new bank account!
the purchasing procedue is as follows , if you purchase by cash:
1. log in to your fundsupermart account via internet
2. purchase the funds that you favor;
3. with 2 or 3 days, you pay the fund purchasing bill by i-banking or cheque...etc.(if you use i-banking, you have to pay to the specific account under the name of ifast ltd, with your fundsupermart account number written as reference)
anyway, pls take my words as reference only, because i never really buy funds in fundsupermart, but dollordex, as the sale charge is lower! but the precedues are the same for them, i think.
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