In a bowl, combine the cream and sugar. Using an electric mixer or a whisk, beat until stiff peaks form, then beat in the mascarpone cheese and vanilla until smooth. Cover and refrigerate until ready to use.
In a trifle bowl, layer crushed amaretto biscuits, then marscapone mixture, then peaches. Drizzle some Amaretto vinegar. Repeat this process until filled.
*Alternative serving method: serve in individual glasses for each guest.